WO2019148799A1

WO2019148799A1 - Process apparatus and method for filling armature with filling liquid

Info

Publication number: WO2019148799A1
Application number: PCT/CN2018/100453
Authority: WO
Inventors: 马盛骏
Original assignee: 北京金风科创风电设备有限公司
Priority date: 2018-01-31
Filing date: 2018-08-14
Publication date: 2019-08-08
Also published as: CN110098704A

Abstract

Disclosed are a process apparatus and method for filling an armature with filling liquid. The process apparatus comprises: a shell configured to support the armature; a filling liquid supply device configured to supply the pressurized filling liquid; and a positive pressure filling device configured to form a positive pressure filling chamber with a surface of the armature having a slit. The positive pressure filling chamber is capable of receiving the filling liquid from the filling liquid supply device, and enabling the filling liquid to seep into a gap in an armature body of the armature by means of the slit under the positive pressure. The process apparatus provided by the present disclosure can fully fill the gap with the filling liquid, and improve the filling rate of liquid in the armature.

Description

Process equipment and method for filling armature with filling liquid

Technical field

The present disclosure is in the field of component liquid infiltration, and more particularly, the present invention relates to a process equipment and method for filling a liquid filled armature.

Background technique

A wind turbine is a large-scale power generation device that converts wind energy into electrical energy. The motor is a core component of the wind turbine, including a rotor and a stator, and the stator includes a stator core and windings wound around the stator core. As shown in FIGS. 1-3, the armature 100 includes a stator core 10 and a winding 20, and a winding slot 11 is disposed on the stator core 10, and the winding 20 is embedded in the winding slot 11 and installed in the slot of the winding slot 11. The wedge 30 is used to secure the winding 20 within the winding slot 11.

Since the wind turbine is placed outdoors, subjected to wind and rain, moisture and moisture can enter the stator and rotor of the generator, causing the stator core and windings to be corroded and damaged. In particular, wind turbines installed at sea are more susceptible to salt and fog. In addition, during the operation of the generator, the insulating film of the winding and the insulating layer such as the slot insulation in the core slot are abraded by electromagnetic vibration and mechanical vibration, and are also subjected to heat and aging. Therefore, in order to ensure the insulation performance of the stator winding, it is also necessary to encapsulate the winding and its adjacent components with an insulating resin to form a tight and firm whole.

Therefore, in the process of manufacturing the generator, the anti-corrosion treatment and the insulation treatment of the various components of the motor, especially the stator windings, are particularly critical.

In order to improve the anticorrosion performance and insulation performance of the stator winding, the stator winding is usually immersed, and the pores in the stator winding are filled with a filling material such as insulating varnish or insulating glue. Dipping treatment is a common immersion treatment method for insulating the stator winding of the motor.

However, the traditional vacuum pressure varnish (VPI) process is carried out in a vacuum thermodynamic environment. During the immersion process, the varnish cannot completely wet the gap between the winding and the core, or between the core laminations. Space, in these locations usually have holes or pores, and can not be completely wetted by the insulating varnish, so that the insulation treatment of the motor can not completely cover all the gap space, which has hidden dangers to the insulation of the motor. In the notch portion, it is difficult to form a strict sealing ring on the outer circumference of the wedge, which creates a gap between the wedge and the core slot silicon wafer. The moisture and water naturally enter the groove along the debonding gap to break the insulation, which is a wind turbine. The operation brings security risks.

Summary of the invention

The purpose of the present disclosure is to provide a process equipment and method for filling a liquid flooding impregnated infiltrating armature, which, under the action of positive pressure, causes the filling liquid to enter the gap between the winding and the core, so that the backward liquid displaces the first incoming liquid, and makes the entry The filling liquid in the gap displaces the gas originally in the gap, so that the filling liquid completely fills the gap.

In order to achieve the above object, the present disclosure provides a process equipment for filling an armature with a liquid, comprising: a casing for supporting an armature; a liquid filling device for supplying a pressurized liquid; a positive pressure filling device forming a positive pressure filling chamber between a surface having a slit opening of the armature, the positive pressure filling chamber being capable of receiving a filling liquid from the filling liquid supply device, and allowing the filling liquid to Under the action of positive pressure, it flows into the gap in the armature body of the armature through the slit.

According to another embodiment of the present disclosure, there is also provided a method of filling an armature with a filling liquid, the method comprising: causing a filling liquid to permeate into a gap of an armature body of the armature under a positive pressure, wherein The filling liquid penetrates through the gap between the wedge and the core on the armature body and displaces the gas in the slit, so that the gas is driven away through the axial slit of the armature.

The process equipment and method provided by the embodiments of the present disclosure pass through the rotor or stator surface (convex or concave) of the motor to face the winding end between the various tissue parts (iron core) and the air interface area, the wedge and the core A sealing protection system is constructed between the seepage gap and the air junction area to overcome the surface of the gas-liquid two-phase infiltrated core wedge by the insulating paint under the traditional vacuum state. The dual function of liquid displacement liquid and liquid displacement gas is realized by means of seepage mechanics. The traditional vacuum pressure impregnation process (ie, VPI) gas residue is solved, thereby completely eliminating voids in all gaps in the armature, preventing subsequent breathing phenomena, improving insulation strength, and making oxygen, moisture and water in the air. It is not easy to invade the inside of the slot insulation, which can delay the aging process of the insulation system, reduce the risk of the motor being exposed to moisture and water, and improve the insulation reliability of the motor.

DRAWINGS

Figure 1 is a partial schematic view of an armature of a wind power generator set;

2 is a perspective view showing an enlarged structure of a winding and an iron core of an armature of a wind power generator;

Figure 3 is a partial cross-sectional view of a winding slot of an armature of a wind power generator;

4 is a schematic view of an armature in accordance with an embodiment of the present disclosure;

Figure 5 is a simplified schematic view of one tooth of the core of the armature shown in Figure 4;

Figure 6 is a partial cross-sectional view of a winding slot of the armature shown in Figure 4;

7 is a schematic structural view of a process equipment for filling a liquid displacement impregnated infiltrating armature according to an embodiment of the present disclosure;

Figure 8 is a top plan view of the process equipment shown in Figure 7;

9 is a schematic diagram of an excitation device in accordance with an embodiment of the present disclosure;

10 is a schematic structural view of a process equipment for filling a liquid flooded impregnated infiltrating armature according to another embodiment of the present disclosure;

11 is a schematic structural view of a process equipment for filling a liquid displacement impregnated infiltrating armature according to another embodiment of the present disclosure.

Description of the reference signs:

100: motor armature, 10: stator core, 11: winding slot, 20: winding, 21, 22: armature end, 23: armature body, 30: slot wedge, 12: core tooth; 13: Seepage slit, 14: axial slit, 15, 17, 18: slit, 16: iron lamination, 200, 300, 400: process equipment, 210, 410: housing, 220: filled liquid supply, 221: Pump, 240, 340, 440: positive pressure filling device, 241, 341: positive pressure closed cylinder, 242, 342, 442: positive pressure chamber, 243, 244: partition plate, 245: iron core clamping piece, 260, 360: recovery unit, 261, 262: separator, 263: gas-liquid separator, 264, 364: recovery chamber, 280: excitation device, 281: vibration exciter, 282: elastic energy storage element, 283: Annular support plate.

Detailed ways

For a better understanding of the present disclosure, the specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

Referring to FIGS. 1 through 7, a motor armature (hereinafter referred to as an armature) 100 in a state to be immersed in paint according to an embodiment of the present disclosure is illustrated. The motor to which the armature 100 is applied may be an inner stator outer rotor structure, that is, the stator is located radially inward of the rotor, including the stator core 10 and the winding 20, and the stator core 10 is provided with a winding slot 11 and a winding 20 The winding groove 11 is embedded in the winding groove 11, and the groove 30 is mounted in the notch of the winding groove 11 to fix the winding 20 in the winding groove 11.

As shown in FIG. 4, the stator core 10 includes a plurality of teeth 12 as a radially outer surface, the winding groove 11 is opened between two adjacent teeth 12, and the wedge 30 is also mounted on two adjacent teeth. Between the 12th.

As shown in FIG. 2, for the stator, the winding slot 11 extends from one armature end to the other armature end along the stator axis, so that the winding slots 11 are formed through the two axial end faces of the stator. The axial passage of the stator. In the case where the winding 20 is mounted in the winding groove 11 and the wedge is installed in the slot, since the winding 20 cannot completely fill the winding groove 11, the winding 20 and the winding groove 11 and the wedge are formed in a large amount. The slit, and at both ends of the stator core 10, the slit in the winding groove 11 communicates with the outside through the axial end opening of the winding groove 11. Thus, it is disclosed that the axial gap formed in the stator can extend axially from one armature end of the armature 100 to the other armature end. In the following description, the opening of the slit formed in the winding groove at the axial end of the stator is referred to as an axial slit opening 14. The axial gap opening 14 described herein may include all gap openings between the core 10, the wedge 30 and the winding 20 at the end face of the armature 100, that is, as long as the gas and/or insulating varnish can be passed through The slit opening from which the slit port flows out from the end face of the armature 100 may be referred to as an axial slit port 14.

As shown in FIG. 3, for each winding groove 11, at the notch, there is a slit 13 between the wedge 30 and the inner wall of the groove of the winding groove 11 of the stator core, hereinafter referred to as a seepage slit 13. The seepage slit 13 extends in the axial direction and communicates with the outside through the axial slit opening 14. In addition, when the opening of the winding groove 30 and the winding groove of the iron core 10 is trapezoidal or triangular, the seepage slit 13 can extend inward at an angle with respect to the radial direction. When the angle is relatively small, the seepage slit 13 can be Extending generally in the radial direction, or may be referred to as a radial gap.

As shown in FIG. 6, when winding the winding 20 on the stator core 10, a plurality of layers of soft solid insulating layer are wound on the winding 20 in advance, and after winding the winding 20 in the winding slot 11, the winding 20 and the winding There are slits 18 between the inner walls of the grooves 11, and a plurality of slits 17 are also present between the plurality of insulating layers. Each of the

slits

13, 18, and 17 described above is in communication with each other and is filled with a gas.

In addition to the

gaps

13, 18 and 17 between the winding 20 and the winding slots 11 of the stator core 10, there are also gaps 15 between the individual core laminations 16 of the stator core 10, as shown in FIG. These slits 15 are all in communication with the

slits

13, 18 and 17 described above. The

slits

13, 15, 18, and 17 described above are various, multi-layered structure slits, and the materials constituting each slit and their respective shapes are different.

The armature 100 can be generally divided into an armature body 23 and two armature ends 21 and 22, and the windings at the two armature ends 21 and 22 can be referred to as winding noses.

The armature 100 can be axially vertical and axially horizontal when the armature 100 is subjected to a dip coating process using a filling liquid (for example, an insulating varnish or a liquid insulating medium or the like, for convenience of description, hereinafter, using an insulating varnish). The liquid filled flooding process equipment 200 provided by the embodiments of the present disclosure is placed and supported in any direction or in any direction.

Referring to Figure 7, there is shown a schematic structural view of a process equipment 200 for filling a liquid flooded impregnated infiltrating armature or a working state diagram of a process equipment 200, for ease of showing the process equipment 200, in accordance with an embodiment of the present disclosure. The armature 100 is shown only in simplified form.

The process equipment 200 can include a housing 210, a fill liquid supply 220, and a positive pressure fill 240. The positive pressure mentioned here is relative to the negative pressure, and the positive pressure means that the pressure inside the container is greater than the normal pressure. For the filling liquid, as long as the pressure is greater than the ambient pressure, it can seep into the gap in the armature 100 under the pressure difference. The greater the pressure, the greater the seepage force, and the easier it is to impregnate the gap in the armature 100.

The housing 210 is located at the outermost periphery, and its outer contour may be substantially cylindrical, and the armature 100 is placed inside the housing 210. The housing 210 may be made of a high-strength material to ensure that its strength is high enough to withstand excessive pressure, and may also be provided with a heat insulating layer to prevent heat inside the housing 100 from being leaked, thereby substantially Form a sealed high pressure environment.

The filling liquid supply device 220 is used to produce a pressurized insulating varnish, and such insulating varnish can be delivered into the housing 210 to perform a dip coating operation on the armature 100. Before the insulating varnish is conveyed into the casing 210, an insulating varnish having good viscosity and fluidity can be prepared in advance, and when the ambient temperature is too low, the insulating varnish can be appropriately heated. The insulating varnish has good fluidity for subsequent impregnation and wetting. To this end, the fill liquid supply device 220 may generally include a heater (not shown) that performs a heating operation, a compressor (not shown) that performs a pressurization operation, and a pump 221 that pumps the varnish. The heater, compressor and pump 221 can be connected in series via a conduit, and the pump 221 can also deliver high pressure insulating varnish to the housing 210 via a conduit.

The positive pressure filling device 240 may be disposed in the housing 210, and is internally provided with a positive pressure chamber 242, which may be substantially at the periphery of the armature body 23, capable of receiving insulating varnish from the filling liquid supply device 220. And the high pressure of the insulating varnish in the positive pressure chamber 242 is applied to the respective slits on the armature main body 23 under the positive pressure applied radially by the armature main body 23, and the multiple tissues are infiltrated while driving The gas in these gaps causes the gas to be driven out of the armature 100 along the axial gap opening 14. It should be noted that before the insulating paint is impregnated and wetted, it is preferable to evacuate the inside of the casing 210 in advance so that the armature 100 is substantially under a certain degree of vacuum to extract the gas in the gap of the porous medium as much as possible. .

Specifically, the positive pressure filling device 240 may include a positive pressure closed cylinder 241, which may include a vertical annular outer cylinder and upper and lower annular partitions connected to the outer cylinder The

plates

243 and 244, such that the positive pressure closed cylinder 241, together with the radial surface of the armature body 23, form a closed and annular positive pressure chamber 242. Wherein, the outer cylinder body can be a part of the housing 210, has high structural strength and has a certain thermal insulation capability.

The

partition plates

243 and 244 may be aligned with the end faces of the armature ends 21 and 22 of the armature 100 such that the entire radially outer surface of the stator core 10 is in the positive pressure chamber 242 so that the insulating paint can be sufficiently contacted The armature body 23 completely infiltrates the armature body 23 while the two winding noses of the armature 100 are outside of the positive pressure chamber 242.

The pump 221 can deliver the high temperature and high pressure insulating varnish into the positive pressure chamber 242 such that the positive pressure chamber 242 has a certain pressure or the pressure therein is higher than a predetermined value, so that the positive pressure chamber 242 is at a high temperature and a high pressure. The environment is thus effective to apply a radial positive pressure to the armature body 23.

In order to equalize the pressures in the positive pressure chamber 242, the pump 221 may be disposed in plurality, distributed in a plurality of circumferential positions of the armature main body 23 or at a plurality of upper and lower positions, thereby further shortening the insulating paint conveying time and saving. The dip coating process takes time. In addition, a plurality of diverting ducts may be provided so that the pressure in the positive pressure chamber 242 can be substantially equalized in the case where only one pump 221 is used.

As described above, the positive pressure chamber 242 can apply a radial positive pressure to the armature body 23, and since the pressure within the positive pressure chamber 242 is high, the value of the positive pressure is also relatively high. The insulating varnish can be infiltrated inwardly into the

slits

18 and 17 in the armature body 23 through the seepage slit 13 under the action of the positive pressure, and can also seep into the gap 15 between the core laminations 16. The infiltrated insulating varnish drives the infiltrated insulating varnish to continue to diffuse inwardly, thereby continuously driving the insulating varnish to ooze inward, and the insulating varnish will displace the gas originally occupying each of the

slits

13, 15, 17, and 18, Alternatively, the infiltration of the insulating varnish will drive off the gas, and the driven gas will flow out of the armature body 23 through the axial slit ports 14 at the upper and lower armature ends 21 and 22 of the armature 100, thereby finally insulating. The lacquer completely occupies each slit in the armature main body 23, and completely fills the gap, and impregnates and wets various surfaces in the slit. For example, the solid insulating layer around the winding can be fully wetted to avoid residual gas in the gap and cause voids. Or the generation of pores, and then establish a complete sealing protection system between the wedge and the iron core and the air interface area, improve the filling rate of the insulating paint, realize the comprehensive insulation treatment of the armature, delay the corrosion aging process of the motor, and improve the motor. The service life.

In the above process of insulating paint and insulating gas, because of the positive pressure exerted by the positive pressure filling device 240, the insulating paint is always under high pressure throughout the immersion infiltration process, and the insulating paint has no chance or possibility. The gasification phenomenon occurs, so that the single-phase state or the non-phase-change state can be effectively maintained, thereby completely avoiding the problem of phase change of the insulating paint in the conventional dipping process and the damage of the two-phase flow caused by the problem (including generation) Additional gas remains in the various gaps of the armature 100, preventing the formation of voids or bubbles in the various, multi-layered tissue gaps.

The respective slits of the insulating varnish flowing into the armature 100 may start to infiltrate with the seepage slit 13 between the wedge 30 and the winding groove 11 as an inlet, or may infiltrate directly from the slit 15 between the core laminations 15, once When the insulating varnish penetrates into the gap, it can diffuse in the gap, including infiltration into the depth of the gap, seepage in the up and down direction or seepage in other directions, while displace the gas in the gap until it completely occupies all the gaps.

In addition, as shown in FIG. 8, the positive pressure filling device 240 may further include a plurality of core holding pieces 245 which are disposed in one-to-one correspondence with the core tooth portions 12, and one core holding piece 245 is clamped from the outside. A core tooth portion 12 completely blocks the radially outer surface of the core tooth portion 12, that is, blocks the gap 15 at the core tooth portion 12, and reserves a one-to-one correspondence with the groove wedge 30 region. The radial flow passage is such that during the wetting process, the insulating varnish around the radial direction of the armature body 23 can only ooze inwardly from the seepage slit 13 between the wedge 30 and the winding groove 11 through the radial flow passage, where The "radial direction" may be substantially in the radial direction, and the flow direction within a certain angular range at the relative radial direction may be referred to as radial flow. Also, once the insulating varnish penetrates into the

slits

17, 18, diffusion flow begins, and diffusion also flows into the gap 15 between the core laminations. In this way, it is possible to prevent the insulating varnish that has penetrated into the slit from flowing out again through the slit 15, and also to ensure uniform distribution and wetting of the insulating varnish in the

respective slits

13, 15, 17, and 18.

The core holding piece 245 can be tightened at both ends to be closely fitted to the radially outer surfaces of the respective core teeth 12 for reliable sealing.

As described above, gases displaced or driven out of the respective slits may flow outward through the axial slit ports 14 at the armature ends 21 and 22, and a portion of the insulating varnish may also be from the axial gap. The mouth 14 leaks out, either during the dipping process or after driving off all the gases. When it is detected by other detecting means that the fluid flowing out of the axial slit port 14 is only an insulating varnish and no longer contains gas, it can be generally determined that the impregnation of the armature 100 is completed.

The process equipment 200 provided by the present disclosure may further include a recovery device 260 to recover the displaced gas and the leaked insulating varnish.

As shown in FIG. 7, in the present embodiment, the recovery device 260 can be disposed at the armature ends 21 and 22. In particular, the recovery unit 260 can include a recovery closure cylinder that can form a closed annular recovery chamber 264 with the end faces of the armature ends 21 and 22, and a gas converging fluid that is driven away by the insulating paint. Into the recovery chamber 264. Recycling a portion of the closed barrel can be accomplished by the housing 210. The above-mentioned

partition plates

243 and 244 may be respectively used as a part of the upper and lower recovery closed cylinders. In addition, the two recovery closed cylinders may further comprise vertically disposed and

cylindrical partitioning cylinders

261 and 262, respectively. Both the

cylinders

261 and 262 are mounted radially inward of the axial slit opening 14.

The recovery unit 260 may further include a gas-liquid separator 263 through which the gas and the insulating varnish recovered into the recovery chamber 264 are sent to the gas-liquid separator 263 for gas-liquid separation for recycling. The recovery device 260 may also include various aftertreatment devices such as an adsorption tower.

Since the windings 20 are relatively tightly mounted in the respective winding slots 11, the sizes of the

slits

13, 17 and 18 are relatively small, and the sizes of the slits are not completely equal, and the gaps in some places are larger, and some places are The gap is smaller. In order to allow the insulating varnish to permeate into the gap more smoothly, and to infiltrate and fill the respective slits more quickly and more thoroughly, the process equipment provided by the embodiments of the present disclosure may further include an excitation device 280, as shown in FIG. In order to induce the vibration of the winding of the armature, in conjunction with the positive pressure of the positive pressure filling device 240, the insulating varnish completely fills the gaps, further improving the fullness and filling rate of the insulating varnish.

The excitation device 280 can be disposed at two ends of the two armature ends 21 and 22, and induce the vibration of the winding noses at both ends, thereby vibrating all the windings, accelerating the infiltration of the insulating varnish, and promoting the insulation in the gap. The diffusion of flow and insulating varnish and assists the insulating paint to displace the gas while allowing the gas to be driven away more quickly.

Each of the excitation devices 280 can include an exciter 281 as a vibration generator. For example, the exciter 281 can be an electromagnetic vortex generator or an ultrasonic vibration generator. The excitation device 280 can also include an annular support plate 283 disposed at the respective armature end, the annular support plate 283 can be in contact with the winding nose and can preferably be disposed at an axially outer side of the winding nose for excitation The vibration generated by the 281 can be transmitted to the annular support plate 283 via the elastic energy storage element 282, causing the annular support plate 283 and the winding 20 to vibrate together at a certain frequency. When the winding 20 vibrates, there is a possibility that the axial direction will cause the axial position to change. Therefore, the annular support plate 283 can also be used as a limiting plate, on the one hand, can transmit vibration to the winding, and can also prevent the winding. The axial sway maintains its axial position, and is particularly suitable for situations where the armature 100 is placed vertically within the housing 210.

By inducing winding vibration under the synergy of the positive pressure filling device 240, not only can the insulating paint flow into the gap and the diffusion flow of the insulating varnish, but also the electromagnetic wire wrapped by the solid insulating layer of the winding can be insulated from the periphery. The immersion of the lacquer reduces the contact angle between the varnish and the windings, allowing the varnish to completely fill the gaps in the winding slots and wrap the windings in the winding slots. In addition, the vibration of the winding contributes to the settlement of the insulating varnish to a certain extent.

In addition, in different periods or stages of the armature dipping, according to various factors such as the viscosity of the insulating varnish, the temperature and pressure in the positive pressure chamber 242, the frequency of the electromagnetic wave generated by the electromagnetic vortex generator can be adjusted to adjust the winding. The immersion infiltration operation is performed adaptively with the vibration frequency and amplitude.

During the varnishing of the armature 100, various internal temperature and pressure sensors disposed within the positive pressure chamber 242 can also be used to detect the internal immersion condition in real time to control the immersion in real time based on the current varnish infiltration state. The temperature and pressure within the positive pressure chamber 242 are adjusted.

A process apparatus 300 for filling a liquid flooded impregnated infiltrating armature according to another embodiment of the present disclosure will now be described in detail with reference to FIG. Here, in the following description, components of the process equipment 300 that are identical or similar to the process equipment 200 are denoted by the same reference numerals, and for the sake of brevity, the same components of the process equipment 300 as the process equipment 200 will not be repeated. description.

In FIG. 10, a job state diagram of the process equipment 300 is shown. In the present embodiment, the motor to which the armature 100 is applied is also an inner stator outer rotor structure.

Process equipment 300 may also generally include a housing 210, a fill liquid supply 220, and a positive pressure fill 340. The armature 100 can be placed within the housing 210 generally axially vertically or axially horizontally or in any direction.

The positive pressure filling device 340 will be mainly described below. In the present embodiment, the positive pressure filling device 340 may include a positive pressure closed cylinder 341, and the positive pressure chamber 342 inside the positive pressure closed cylinder 341 may be an outer cylinder, a partition plate 243, an armature main body 23, an armature. The end portion 21 and the dividing cylinder 262 are sealed, that is, the outer surface of the armature main body 23 and the lower armature end portion 21 are in the positive pressure chamber 342 to be subjected to a positive pressure. Of course, the axial slot opening 14 of the armature end 21 can be within the positive pressure chamber 342.

When the wetting is performed, the insulating varnish can penetrate not only from the seepage slit 13 in the armature main body 23 into the respective slits but also from the axial slit opening 14 at the armature end portion 21 located below. The driven gas can rise upward within the gap and be driven away through the axial slit opening 14 at the upper armature end 22.

The recovery device 360 of the process equipment 300 may be provided with only one, which is located above the armature end 22. Similarly, the recovery device 360 can include a recovery chamber 364 that can be enclosed by the end faces of the divider plate 243, the divider barrel 261, and the armature end 22.

The process equipment 300 can also be provided with the above-mentioned excitation device 280 and core holding piece 245, which will not be described herein.

In addition, in addition to the above arrangement, the armature end 22 can be placed in the positive pressure chamber 342 with the armature end 22 outside the positive pressure chamber 342. In this case, the recovery device 360 can be disposed below the armature end 21.

A process equipment 400 for filling a liquid flooded impregnated infiltrated armature in accordance with another embodiment of the present disclosure will now be described in detail with reference to FIG. In the following description, components of the process equipment 400 that are identical or similar to the

process equipment

200, 300 are denoted by the same reference numerals, and for the purpose of brevity of description, the same for the process equipment 400, the

process equipment

200, 300 The parts will not be described repeatedly.

In the present embodiment, the motor to which the armature 100 is applied is an outer stator inner rotor structure, that is, the stator is radially outward of the rotor, and the winding groove 11 and the wedge 30 are disposed on the radially inner surface of the armature body 23. Therefore, the surface to be insulated is a radially inner surface.

Process equipment 400 can likewise include a housing 410, a fill liquid supply 420, and a positive pressure fill 440. The armature 100 can be supported by the housing 410 generally axially vertically or axially horizontally or in any direction. Different from the above-mentioned

process equipments

200 and 300, the housing 410 and the positive pressure filling device 440 are both disposed in the inner cavity of the armature 100, and the positive pressure chamber 442 is located radially inward of the armature main body 23, and other specific structures are similar. I will not repeat them here.

Further, in the process equipment 400, the positive pressure chamber 442 may take the form of the positive pressure chamber 242 in the above embodiment, that is, the positive pressure chamber 442 applies only a positive pressure to the radially inner surface of the armature body 23. The insulating varnish penetrates into the respective slits in the armature 100 from the seepage slit 13 between the wedge 30 and the winding groove 11. Alternatively, the positive pressure chamber 442 may also take the form of the positive pressure chamber 342 in the above embodiment, that is, the positive pressure chamber 442 applies to the radially inner surface of the armature body 23 and the end surface of one armature end portion 21. The positive pressure acts such that the insulating varnish can penetrate into the respective slits in the armature 100 from the seepage slit 13 between the wedge 30 and the winding groove 11 and the axial slit opening 14 at the armature end 21. The arrangement of the two positive pressure chambers 442 is similar to the above, and will not be described herein.

According to an embodiment of the present disclosure, there is also provided a method of filling a liquid flooding intrusion armature, which utilizes positive pressure action to drive the insulating varnish into the armature based on engineering thermodynamics, fluid mechanics, mass transfer and multiphase flow principles. The various gaps and the displacement of the gas, so that the insulating paint can fill the gap.

In the present embodiment, the space inside the casing 210 can be evacuated before the insulating varnish is conveyed into the positive pressure chamber 242, so that the armature 100 is substantially under a certain degree of vacuum, and the residue is reduced as much as possible. The gas in the gap in the armature. Next, the insulating varnish is delivered into the positive pressure chamber 242 such that the high pressure and high pressure state is reached within the positive pressure chamber 242.

The positive pressure exerted on the armature surface by the high temperature and high pressure environment in the positive pressure chamber 242 causes the insulating varnish to seep into the gap in the armature body 23. The insulating varnish can be infiltrated through the gap between the wedge 30 and the core 10 on the armature main body 23 and displace the gas originally remaining in the slit, so that the gas is discharged axially outward through the axial slit opening 14 From the armature body. Once the insulating varnish penetrates into the gap, it can spread in the gap, filling the entire gap and driving out all the gases.

In the vacuum state, in cooperation with the positive pressure in the positive pressure chamber 242, the insulating varnish is in a high pressure state throughout the immersion and wetting process, and no gasification phenomenon occurs, so that it does not seep into the respective gaps of the armature 100. A phase change occurs, thereby maintaining a single-phase state, avoiding various problems caused by the two-phase flow of the insulating varnish, and preventing the formation of voids or bubbles in a plurality of layers of the multilayer structure.

In addition, it should be noted that in the above method, the immersion and wetting process for the armature 100 may last for several hours or even longer, ensuring that the insulating varnish can completely seep into the various tissue gaps in the armature 100, ensuring The gases in these gaps are all displaced or driven away.

The radially outer surface of the core tooth portion 12 of the armature 100 may also be blocked prior to delivery of the insulating varnish to prevent the insulating varnish from penetrating through the gap 15 between the core laminations 16 at the tooth portion 12, such that The insulating varnish can only penetrate through the seepage slit 13 between the wedge 30 and the winding groove 11 of the core 10.

In addition, during the dip coating process, the winding vibration of the armature 100 can be induced to promote the seepage of the insulating varnish toward the slit and the gas drive away, for example, the winding nose at the upper and lower ends of the armature 100 can be vibrated, thereby Driving the entire winding in the winding slot 11 to vibrate, on the one hand, the insulating paint penetrates smoothly from the gap, and also contributes to the diffusion flow of the insulating paint in the gap, and improves the infiltration of the insulating paint into the surface and material in the gap. Therefore, the filling rate and fullness of the insulating varnish can be further improved to avoid the generation of voids.

In addition, when inducing winding vibration, the winding can also be limited to prevent axial turbulence of the winding.

In addition to the above specific description, the process equipment provided by the present disclosure may further include other parts, such as a control system or the like, so that the insulating varnish infiltration process can be controlled in real time according to various monitoring signals.

After the immersion paint is applied to the armature 100, the secondary varnish can also be performed, so that the insulating varnish can completely cover the outer surface of the armature 100, cover the armature end and the winding nose to achieve comprehensive insulation. deal with.

Through the process equipment and method for filling liquid flooding infiltration provided by the present disclosure, the insulating varnish enters the winding slot from the gap between the armature end and the iron core, enters the gap in the winding slot from the iron core and the wedge wedge, enters the winding The gap between the solid insulation layer wound around the electromagnetic wire, including the entry into the core lamination, is carried out in a vacuum thermodynamic environment; during the dipping process, the insulating varnish maintains the liquid single-phase state and remains under positive pressure. The non-phase change of the insulator enters the solid insulation layer of the armature winding, enters the gap between the winding and the core, and the liquid in the gap drives the gas in the gap, impregnates and infiltrates the solid surface, and the liquid that enters continuously drives the first entry. The liquid continuously immerses and infiltrates the gap and the solid surface continuously.

In addition, the electromagnetic eddy current generator is used to induce the vibration of the winding, and promote the flow, displacement and diffusion of the liquid insulating paint in the gap. At the same time, it can also promote the infiltration of the electromagnetic wire and the peripheral liquid insulating varnish, reduce the contact angle, and fill and wrap the peripheral gap space.

The object to which the embodiments of the present disclosure are directed may be a motor stator or other component requiring insulation treatment, impregnation and filling of the liquid insulating material for a particular structure, and limited to the armature or stator described above.

Although the embodiment of the present disclosure has been described above by taking the core tooth portion formed on the outer surface of the armature, the working equipment and the process according to the embodiment of the present disclosure in the case where the core tooth portion is formed on the inner surface of the armature. The same applies to the method.

In the cylindrical cavity of the rotor or stator of the motor (convex or concave), between the various tissue parts (iron core) and the air interface area at the end of the winding, between the seepage gap between the wedge and the core and the air transfer area The sealing protection system is constructed to overcome the surface of the gas-liquid two-phase infiltrated core wedge by the insulating paint under the traditional vacuum condition, which causes the gas-liquid two phases to enter various gaps. The dual function of liquid displacement liquid and liquid displacement gas is realized by means of seepage mechanics. The traditional vacuum pressure impregnation process (ie, VPI) gas residue is solved, thereby completely eliminating voids in all gaps in the armature, preventing subsequent breathing phenomena, improving insulation strength, and making oxygen, moisture and water in the air. It is not easy to invade the inside of the slot insulation, which can delay the aging process of the insulation system, reduce the risk of the motor being exposed to moisture and water, and improve the insulation reliability of the motor.

The present invention has been described in detail herein with reference to the preferred embodiments of the embodiments of the invention The embodiments may be modified and improved, and such modifications and improvements are also intended to be within the scope of the present disclosure.

Claims

A process equipment for filling an armature with a filling liquid, characterized in that the technological equipment comprises:

a housing (210, 410) for supporting the armature (100);

Filling a liquid supply device (220) for supplying the pressurized filling liquid;

a positive pressure filling device (240, 340, 440) forming a positive pressure filling chamber (242, 342, 442) between the surface of the armature (100) having a slit, the positive pressure filling chamber (242, 342, 442) capable of receiving a filling liquid from the filling liquid supply device (220) and allowing the filling liquid to seep through the slit opening to the armature body of the armature (100) under positive pressure ( Within the gap in 23).
The process equipment of claim 1 wherein said positive pressure filling means (240, 340, 440) comprises:

a positive pressure closed cylinder (241, 341) formed in a circumferential direction of the positive pressure closed cylinder (241, 341) and the armature body (23) Between the surfaces, an annular closed chamber, the filling liquid is delivered into the positive pressure chamber (242, 342, 442), the pressure in the positive pressure chamber (242, 342, 442) is greater than the ambient pressure, Thereby the filling liquid seeps into the gap in the armature body (23) through the radial slit opening.
The process equipment according to claim 2, wherein said positive pressure chamber (242, 342, 442) is formed in said positive pressure closed cylinder (241, 341) and said armature body (23) a circumferential surface and an outer surface of the first armature end of the armature (100), and an axial gap opening (14) at the first armature end is located in the positive pressure chamber (242, 342, 442), so that the filling liquid can also seep through the axial slit opening (14) into the gap in the armature body (23), and the removed gas or overflow filling liquid passes through An axial gap opening (14) at the second armature end of the armature flows out.
The process equipment according to claim 3, wherein the armature (100) is placed vertically in an axial direction, and the first armature end is an armature of the armature (100) below End (21).
The process equipment of claim 1 wherein said armature body (23) includes a plurality of core teeth (12), said positive pressure filling means (240, 340, 440) further comprising a plurality a core clamping piece (245) to cover a radially outer surface of each of the core teeth (12) of the armature (100) such that the filling liquid passes only the wedge (30) and the core A radial seepage slit (13) between the teeth (12) seeps into the gap of the armature body (23).
The process equipment according to claim 1, characterized in that the process equipment further comprises a recovery device (260, 360) for recovering the filling from the axial gap opening (14) of the armature (100) liquid.
The process equipment of claim 6 wherein said recovery means (260, 360) comprises:

Recycling the closed cylinder at a second armature end (22) of the armature (100), the recovery closed cylinder and the second armature end (22) forming an annular closed recovery a chamber (264, 364), an axial gap opening (14) at the second armature end (22) is within the recovery chamber (264, 364);

The gas-liquid separator (263) performs gas-liquid separation treatment on the recovered filling liquid.
The process equipment according to claim 1, characterized in that the process equipment further comprises excitation devices (280) respectively disposed at a first armature end (21) and a second of the armature (100) At the armature end (22), the winding nose of the armature (100) is induced to vibrate.
The process equipment of claim 8 wherein said excitation device (280) comprises:

Annular support plates (283) respectively disposed at the first armature end (21) and the second armature end (22) and contacting the winding nose;

a vibration exciter (281) that generates vibration;

An elastic energy storage element (282) is capable of transmitting vibration generated by the exciter (281) to the annular support plate (283).
Process equipment according to claim 8, characterized in that the exciter (281) is an electromagnetic vortex generator or an ultrasonic vibration generator.
The process equipment according to claim 1, wherein the filling liquid supply device (220) comprises:

a compressor that pressurizes the filling liquid to a predetermined pressure value;

The pump (221) delivers the pressurized fill liquid to the positive pressure filling device (240, 340, 440).
A method of filling an armature with a filling liquid, characterized in that the method comprises:

Under positive pressure, the filling liquid seeps into the gap of the armature body (23) of the armature, wherein the filling liquid passes through the wedge (30) and the iron core (10) on the armature body (23) The gap between them infiltrates and displaces the gas within the gap such that the gas is driven away through the axial gap opening (14) of the armature (100).
The method according to claim 12, further comprising: sealing a radially outer surface of each of the core teeth (12) of the core (10) of the armature (100) such that The filling liquid seeps into the armature (100) only through the seepage gap (13) between the wedge (30) and the core (10).
Method according to claim 12, characterized in that the method further comprises inducing the winding of the armature (100) from the two armature ends (21, 22) of the armature (100) Vibration, which facilitates the seepage of the filling liquid towards the gap and the removal of the gas.
A method according to any one of claims 12-14, wherein the method further comprises the step of: prior to supplying the filling liquid to the armature (100), the armature ( 100) placed in the sealed casing (210, 410) and evacuated the inside of the casing (210, 410).
The method according to claim 15, wherein said filling liquid is always in a single-phase liquid state during the process of seeping into the gap.